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Which process may start if air cools to the dew point?

Answer and explanation

Correct answer: Condensation

Correct answer: C, condensation. The dew point is the temperature at which air becomes saturated with the water vapour already present, assuming the pressure and moisture content remain appropriate. If the air cools to or below this point, excess vapour can change into liquid droplets, so condensation may begin. A, transpiration, is water-vapour release from plants and is not initiated by air reaching the dew point. B, salinisation is salt accumulation in soil or water, not a phase change of vapour. D, erosion is the wearing and movement of earth materials by agents such as water or wind. Memory cue: dew point means “cool enough for droplets”; it does not guarantee rain, because droplets may form on surfaces or in clouds.

Related tags

GeographyDew-PointCondensationSaturationHumidityEvaporationAnd CondensationHumidity Evaporation And CondensationWater In The AtmosphereClass 12 Mcq

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